A102839 - cp's OEIS frontend

A102839 a(0) = 0, a(1) = 1, and a(n) = ((2n - 1)a(n-1) + 3na(n-2))/(n - 1) for n >= 2.

n	a(n)
0	0
1	1
2	3
3	12
4	40
5	135
6	441
7	1428
8	4572
9	14535
10	45925
11	144408
12	452244
13	1411501
14	4392675
15	13636080
16	42237792
17	130580451
18	403009209
19	1241912580
20	3821849640
21	11746816389
22	36064532427
23	110610649548
24	338928124500
25	1037636534025

[0, 1, 3, 12, 40, 135, 441, 1428, 4572, 14535, 45925, 144408, 452244, 1411501, 4392675, 13636080, 42237792, 130580451, 403009209, 1241912580, 3821849640, 11746816389, 36064532427, 110610649548, 338928124500, 1037636534025]

cp's OEIS Frontend

A102839 a(0) = 0, a(1) = 1, and a(n) = ((2n - 1)a(n-1) + 3na(n-2))/(n - 1) for n >= 2.

Table of values

List of values

cp's OEIS Frontend

A102839 a(0) = 0, a(1) = 1, and a(n) = ((2*n - 1)*a(n-1) + 3*n*a(n-2))/(n - 1) for n >= 2.

Table of values

List of values

A102839 a(0) = 0, a(1) = 1, and a(n) = ((2n - 1)a(n-1) + 3na(n-2))/(n - 1) for n >= 2.